good. but 1 thing. all tests running at different times are shit. difficulty changes and that is enough. but luck changes as well. whatever. all pointless. only same pool, same cards, same settings, same rig, same time frame, different miners.
It doesn't matter if the difficulty changes if you run the test for 24 hours and use the average difficulty from whattomine.com for the past 24 hours. Pool luck *can* affect earnings, but if the pool finds blocks every few minutes and the test is, once again, run for 24 hours then missing or gaining a block or two won't affect earnings by more than a few tenths of a percent. For example, if a block is found every 5 minutes on average that works out to 288 blocks per 24 hour period; gaining or losing 1 block would shift earnings by 1/288, or 0.35%.